If you cannot logon to your SAP system over SAPGUI for various reasons (it might be the reason is , there are no empty work processes to handle your request) then you can use the DPMON with following informations…

If your Web Dispatcher configurations are completed and SICF transaction activations are OK but you still getting “HTTP 500 Internal Server Error” then give a chance to following check to eliminate this situation…

If you getting a message like “Update of Verification PSE Failed” after the execution of report “RTCCTOOL” to check “Service Prepation” status of your SAP system then you can follow the related solution steps which shown below…

If you are getting an error screen like “HTTP 500 Internal Server Error” after the activation of SAP Web Dispatcher, then we should check the SICF transaction code for the activation of related SAP screen.